Marktkram is a marketplace for buying and selling used stuff. Without fees.
As a buyer, you can place bids on items to haggle about the prices.
Yet as a seller, you will always have full control over your prices. As long as the bids seem too low, you won't have to sell your items.
An item is sold when either a buyer buys it for the currently asked price, or the seller sells it to a bidder at the bidder's current bid.

Party at your dancing school, musical performance of your child's school class, open house at your company, public talk given by that funny professor from your university? Tell us what's up in your region.